Includes bibliographical references (page 31) and index.

"Astronomy is a branch of science that's concerned with space, planets, stars, and the universe. Astronomers are scientists who try to understand the workings of the universe by studying celestial bodies and whatever else lies beyond Earth's atmosphere. How exactly do they do this? In this illuminating book, readers will discover how astronomers conduct research, collect data, and analyze their findings-a perfect read for any young person who has stared up at the sky and wondered what stars are made of"--,Provided by publisher.